Regarding Windows 95 OEM Service Release 2 (codename: Detroit) [Build 4.00.1111], a new version of Windows 95 released at the end of 1996. It is also called Windows 95B. OSR 2 provides a number of new
features and bug fixes. The most important new feature is FAT32, a new version of the file allocation table. FAT32 supports disk drives up to 2 terabytes and yields better
storage efficiency due to smaller clusters.

Two smaller updates to the
second were released in the form of a USB Supplement (OSR 2.1, also called Windows 95B [Build 4.03.1212]) and the Windows
Desktop Update (OSR 2.5, called Windows 95C [Build 4.03.1214]). Both were available as stand-alone updates and as
updated disc images shipped by OEMs. OSR 2.5 was notable for featuring a number
of changes to the Windows Explorer, integrating it with Internet Explorer
4.0—this version of the Explorer looks very similar to the one featured in
Windows 98.